I cannot get the transponder to show up on the Skyview. When I first connected, there was an indication on the top screen, showing 1200 and something else. In configuring other elements at one time there was something loading to the transponder, it got to 19% and seemed to lock up, despite the warnings, I rebooted to get out of the lockup. I have tried everything in the install manual, everything seems correct, but no display of transponder on the Skyview display. What am I missing?